The country also has 402 kilometers (249 miles) of coastline on the Bight of Biafra, part of the Atlantic Ocean. The topography of Cameroon is varied, ranging from tropical rain forests in the south to mountainous highlands in some western central regions, and semi-arid savanna in the far north.
The Ionisphere bounces radio waves back to earth and regulates the amount of radiation that gets to the lower atmospheres. It all depends on the Sun's activity. The stratosphere is what actually protects us from the UV rays of the sun.
A Dancing Layer of the Sun Above the photosphere is a layer of gas, approximately 2000 km thick, known as the chromosphere or sphere of color. In the chromosphere energy continues to be transported by radiation. Hydrogen atoms absorb energy from the photosphere and most of the energy is then emitted as red light.